Layer: 2011 California Department of Fish & Wildlife Kelp Polygons (ID:5)

View In: Map Viewer

Name: 2011 California Department of Fish & Wildlife Kelp Polygons

Display Field: Class_Name

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This vector dataset represents mosaicked multi-spectral imagery, targeting giant kelp beds along the Naval Air Systems Command (NAVAIR) Point Mugu Sea Range. The area from Santa Monica Pier, LA county to Pt. Magu, Ventura county were not photographed. Some of the outer portions of kelp beds were cut off due to inadequate overlap in aerial surveys, these areas are noted in Grid Code 2. The user is cautioned to look for areas which appear truncated.DISCLAIMERThe user is cautioned against making direct comparisons between the various kelp surveys for the following reasons: 1) Timing of the survey is important, particularly with respect to growing season, conditions in the ocean, storms, and harvest levels preceding the dates of survey photography. Seasonal variability may account for differences in surveys, which may not reflect a change in the bed's extent, productivity, or harvest level. 2) Statistical significance in change of area should be evaluated. To do this, a variance parameter is needed, which is obtained by repeated measurements. 3) Survey methods may not be consistent. Some method of calibration between the methods needs to be performed in order to insure a change of area is not due to survey instrumentation and not misinterpreted as a biological change. 4) An area where no kelp data are present may represent an area devoid of kelp, or may represent an area where kelp was not detected due to poor photo quality, missing photo coverage, or other issues with data collection and processing. Photo coverage is extensive for the state, but the user is advised to consult the supplementary information for each year to determine whether photographs were acquired for an area of interest.NOTE: File reindexed to match CDFW kelp administrative kelp bed boundaries modified by changes to California Code of Regulations, Title 14, Section 165, effective April 1, 2014

Copyright Text:

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Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

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Object ID Field: OBJECTID

Unique ID Field:

Global ID Field:

Type ID Field:

Fields:

OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
Class_Name (type: esriFieldTypeString, alias: Class_Name, SQL Type: sqlTypeOther, length: 50, nullable: true, editable: true)
KelpBed (type: esriFieldTypeSmallInteger, alias: KelpBed, SQL Type: sqlTypeOther, nullable: true, editable: true)
Shape_Leng (type: esriFieldTypeDouble, alias: Shape_Leng, SQL Type: sqlTypeOther, nullable: true, editable: true)
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Last Edit Date: 7/28/2024 6:17:51 AM

Schema Last Edit Date: 7/28/2024 6:17:51 AM

Data Last Edit Date: 7/28/2024 6:17:51 AM

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